title: Enhanced CO2 sequestration by a novel microalga: Scenedesmus obliquus SA1 isolated from bio-diversity hotspot region of Assam, India.
abstract: The present study aimed to isolate a high CO2 and temperature tolerant microalga capable of sequestering CO2 from flue gas. Microalga strain SA1 was isolated from a freshwater body of Assam and identified as Scenedesmus obliquus (KC733762). At 13.8±1.5% CO2 and 25 °C, maximum biomass (4.975±0.003 g L(-1)) and maximum CO2 fixation rate (252.883±0.361 mg L(-1) d(-1)) were obtained which were higher than most of the relevant studies. At elevated temperature (40 °C) and 13.8±1.5% CO2 maximum biomass (0.883±0.001 g L(-1)) was obtained. The carbohydrate, protein, lipid, and chlorophyll content of the CO2 treated SA1 were 30.87±0.64%, 9.48±1.65%, 33.04±0.46% and 6.03±0.19% respectively, which were higher than previous reports. Thus, SA1 could prove to be a potential candidate for CO2 sequestration from flue gas as well as for the production of value added substances.
authors.affiliation: Centre for Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
authors.forename: Samarpita
authors.initials: S
authors.lastname: Basu
authors.forename: Abhijit Sarma
authors.initials: AS
authors.lastname: Roy
authors.forename: Kaustubha
authors.initials: K
authors.lastname: Mohanty
authors.forename: Aloke K
authors.initials: AK
authors.lastname: Ghoshal
mesh_terms: D044822:Biodiversity; D018533:Biomass; D002241:Carbohydrates / Q000032:analysis; D002245:Carbon Dioxide / Q000378:metabolism*; D002734:Chlorophyll / Q000378:metabolism; D005618:Fresh Water; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D007194:India; D008055:Lipids / Q000032:analysis; D008855:Microscopy, Electron, Scanning; D010802:Phylogeny; D010940:Plant Proteins / Q000378:metabolism; D044444:Scenedesmus / Q000145:classification / Q000302:isolation & purification / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D002241:Carbohydrates; D008055:Lipids; D010940:Plant Proteins; D002734:Chlorophyll; D002245:Carbon Dioxide
keywords: Biomass productivity; CO(2) fixation; Microalgae; Scenedesmus obliquus